Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
It is a commercial malware application designed to track user activity in the Internet. It can send logged data to a configurable e-mail address. Although Stealth Website Logger is not an actual spyware, its activity can severely violate user privacy. The risk must be manually installed. It secretly runs on every Windows startup and hides its active processes.
Technical details (How to remove Stealth Website Logger(pop up))